JP2005352935A - Device for deciding suspicious person and method for deciding suspicious person - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for deciding a suspicious person by which suspicious person discrimination is easily done with good accuracy without providing an unpleasant feeling, or the like to a general visitor, or the like. <P>SOLUTION: When a person crosses an infrared sensor 7, a signal telling the invasion of the person is input to a system control section 13. Thus, the system control section 13 controls a main power supply section 15 to start a power supply, and starts-up the entire device 100 for deciding the suspicious person including a suspicious person decision section 8. After elapsing a specified period of time from the startup of the suspicious person decision section 8, the system control section 13 controls a voice output section 14. Thus, a speaker 16 outputs a notification signal consisting of a calling voice. A CPU (Central Processing Unit) 4 compares the action of the person with a brightness change image stored on a memory contained in the CPU before and after the timing of a notification to obtain the action of the person using the timing of the notification as a boundary. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a suspicious person determination device and a suspicious person determination method.

  2. Description of the Related Art Conventionally, in a device for determining a suspicious person, for example, after processing a camera image captured in a predetermined area, the image information is stored in a memory, and the image information is stored at a time having a predetermined time difference. It is determined whether or not it is a suspicious person by discriminating a change in information that occurs when the two are compared based on a predetermined threshold or a change pattern (see Patent Document 1).

  In addition, for example, a characteristic amount in the change in the information is extracted, and a risk level is determined based on the characteristic amount, thereby threatening a suspicious person or issuing a warning (Patent Document). 2).

JP 2003-051075 A (page 2-8, FIG. 1) Japanese Patent Laid-Open No. 05-006420 (page 2-3, FIG. 1)

  In the conventional suspicious person determination device as described above, it is determined whether or not the person is a suspicious person by using only the change obtained when the input camera image information is compared at times having a predetermined time difference. In other words, since the determination is made only by the situationally continuous movement or movement characteristics, it is generally difficult to distinguish the movement or movement characteristics of the person visiting the area. Therefore, depending on the area that needs to be determined and the characteristics / individuality of the person's movement, it may be difficult to set a threshold for determining the suspicious person, or the suspicious person determination itself may be wrong.

  Conventionally, threats and warnings are performed based on the determination results as described above, and if an incorrect determination is made, there are problems such as discomfort and mental distress for general visitors. It was.

  The present invention has been made to solve the above-described problems, and is capable of easily and accurately determining a suspicious person without causing discomfort to a general visitor or the like. And it aims at providing a suspicious person determination method.

  In order to solve the above-described problem, a suspicious person determination device according to the present invention includes a detection unit that detects a person to be determined, and a notification unit that notifies a person that the detection has been performed. Suspicious person judging means for judging whether or not the person is a suspicious person based on a change in a signal based on a reaction of the person accompanying the notification.

  The suspicious person determination device according to the present invention is based on a detection unit that detects a person to be determined, a notification unit that notifies a person that the detection has been performed, and a person's reaction accompanying the notification Suspicious person judging means for judging whether or not a person is a suspicious person based on a change in the signal is provided. Accordingly, the suspicious person can be easily and accurately identified without giving a general visitor an unpleasant feeling.

<Embodiment 1>
Hereinafter, the suspicious person determination device 100 according to Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram illustrating a configuration of the suspicious person determination device 100. FIG. 2 shows an image input to the suspicious person determination device 100. FIG. 3 shows a luminance image of the video in FIG. FIG. 4 shows a luminance change image which is a difference between the luminance images of FIG.

  First, the operation of the suspicious person determination device 100 will be described. In FIG. 1, power is always supplied to the infrared sensor 7 and the system control unit 13 by a sub power supply unit (not shown). For example, when a person (including both a suspicious person and a general visitor) crosses the infrared sensor 7 installed in front of the house entrance, a signal that the person has entered is input to the system control unit 13. As a result, the system control unit 13 controls the main power supply unit (main power supply unit) 15 to start power supply, thereby starting the entire suspicious person determination device 100 including the suspicious person determination unit 8. That is, the infrared sensor 7 functions as a detection unit according to the present invention, and the suspicious person determination unit 8 functions as a suspicious person determination unit according to the present invention.

  Next, for example, a video signal from a camera (not shown) installed so as to be able to capture an image of a visitor standing in front of the entrance door of the home is input from the video input terminal 5. The input video signal is converted from an analog signal to a digital signal by the video AD converter 1. The converted digital video signal is transmitted to the video system switcher 2 controlled by the control signal 6 and the compressor 9. This control signal 6 is for performing the following video dividing operation while synchronizing.

  The digital video signal transmitted to the video switcher 2 is divided into, for example, a 16 × 12 dot luminance image as shown in FIG. This luminance image is temporarily stored in the memory 3 as data for each dot. The CPU 4 reads the data stored in the memory 3 for each dot. At this time, the CPU 4 stores the difference per unit time of the luminance image data as a luminance change image in a memory (not shown) built therein.

  FIG. 2 shows a video signal input from the video input terminal 5. FIG. 2A shows a video signal when there is no person in front of the door. FIG. 2B shows a video signal when a person stands in front of the door (before a notification by a call voice described later). FIG. 2C shows a video signal when the person escapes after the notification.

  FIGS. 3A to 3C show luminance images when the video signals shown in FIGS. 2A to 2C are divided into dots by the video switcher 2, respectively. Further, as shown in FIGS. 4A to 4C, the CPU 4 calculates a difference per unit time of the luminance images shown in FIGS. 3A to 3C, that is, a luminance change image. Store in the built-in memory.

  The digital video signal transmitted to the compressor 9 is compressed to generate compressed video signal data. This video signal compressed data is stored in the SDRAM 10 having a predetermined storage capacity under the control of the CPU 4. That is, in the SDRAM 10, when the amount of stored data is likely to exceed the storage capacity, the oldest data is erased in order.

  Next, when a predetermined period has elapsed since the activation of the above-described suspicious person determination unit 8, the system control unit 13 controls the audio output unit 14, so that, for example, “who is?” A notification signal consisting of a calling voice is output. That is, the audio output unit 14 and the speaker 16 function as notification means according to the present invention that notifies that detection has been performed.

  Then, the CPU 4 compares luminance change images stored in its own memory before and after the notification timing in order to obtain the action of the person at the notification timing.

  As a result of the comparison, when the luminance change image (difference) has changed more than a predetermined threshold value, the CPU 4 has a feature that the detected person is shaken by notification. It is determined that the person is a suspicious person. In this comparison, for example, as will be described later, the determination can be performed by using a video change rate composed of the number of dots of the luminance change image.

  As a result of the comparison, when the luminance change image changes smaller than a predetermined threshold value set in advance, the CPU 4 determines that the visitor is a general visitor.

  If it is determined as a suspicious person as a result of the comparison, the CPU 4 records the compressed video signal data stored in the SDRAM 10 on a storage medium (not shown) built in the storage device 12 via the driver circuit 11. . In the SDRAM 10, the input video signal compressed data is stored from the time when a person enters and the suspicious person determination unit 8 is activated. Accordingly, it is possible to record the video from the time when the suspicious person enters and the suspicious person determination device 8 is activated on the storage medium. In addition, by storing only necessary data on the storage medium after temporarily storing it in the SDRAM 10, the storage medium can be used efficiently. That is, the storage device 12 functions as a recording unit according to the present invention, and the storage medium functions as a recording medium according to the present invention.

  Recording on the storage medium is performed in a predetermined period set in advance. After this period has elapsed, the system control unit 13 controls the main power supply unit 15 to stop the power supply of the suspicious person determination unit 8. Thereby, the suspicious person determination apparatus 100 again shifts to the mode in which the intrusion of the person is detected by the infrared sensor 7.

  As a result of the comparison, when it is determined that the visitor is a general visitor, the system control unit 13 controls the main power supply unit 15 to supply power to the suspicious person determination unit 8 after a predetermined period has elapsed. Stop. Thereby, the suspicious person determination apparatus 100 again shifts to the mode in which the intrusion of the person is detected by the infrared sensor 7.

  Next, the above operation will be described using the flowchart shown in FIG.

  First, in step S <b> 1, the suspicious person determination device 100 always determines whether or not a signal is input from the infrared sensor 7. If a signal is input, the process proceeds to step S2, and if not input, step S1 is repeated.

  Next, in step S <b> 2, the system control unit 13 activates the suspicious person determination unit 8 by controlling the main power supply unit 15.

  Next, proceeding to step S3, the CPU 4 calculates the dot number of the difference per unit time, that is, the video change rate ΔP1, while storing the video signal compressed data in the SDRAM 9, and stores it in the memory built therein. In general, the greater the change in the movement of a person, the greater the number of dots in the difference per unit time of the video. That is, the video change rate ΔP1 represents a change in the operation before the detected person is notified.

  Next, the process proceeds to step S4, and the suspicious person determination device 100 asks the person who has invaded "who is?" Or the like after a predetermined period (T1) has elapsed since the activation of the suspicious person determination unit 8 in step 2. A notification signal consisting of the call voice is output.

  Next, proceeding to step S5, the CPU 4 stores the video signal compressed data in the SDRAM 9 until the predetermined period (T2) elapses from the time when the notification signal is output in step 4, while the difference of the unit time is stored. The number of dots, that is, the video change rate ΔP2 is calculated and stored in a memory built in itself. This video change rate ΔP2 represents a change in operation after notification of the detected person.

  Next, in step S6, the CPU 4 calculates the difference | ΔP2−ΔP1 | between the video change rates ΔP1 and ΔP2, and if this difference is smaller than a predetermined threshold value, the detected person is detected. Determines that it is not a suspicious person but a general visitor, and proceeds to step S8. If the difference is greater than or equal to a predetermined threshold, it is determined that the detected person is a suspicious person, and the process proceeds to step S7. In step S7, the CPU 4 records the compressed video signal data stored in the SDRAM 10 on a storage medium for a predetermined period. Thereby, it becomes possible to record a video of a suspicious person.

  Next, in step S8, the system control unit 13 controls the main power supply unit 15 to shift the suspicious person determination unit 8 to a standby state. Thereby, a series of processes are completed.

  As described above, in the suspicious person determination device and the suspicious person determination method according to the present embodiment, the notification by the calling voice that the detection by the infrared sensor 7 has been performed is made, and the change in the movement of the person accompanying the notification is indicated by the luminance. The suspicious person is determined by obtaining the change. Therefore, it is possible to easily determine the suspicious person without giving discomfort to a general visitor or the like.

  Further, in a mode in which no intrusion of a person is detected, the suspicious person determination unit 8 is kept waiting, and when the intrusion of a person is detected, the suspicious person determination unit 8 is activated, and the intrusion of the person is not detected again. The suspicious person judgment part 8 is made to wait. Therefore, power consumption can be reduced. In the above description, the suspicious person determination unit 8 is activated by using the system control unit 13 outside the suspicious person determination unit 8, but instead of the system control unit 13, It is good also as a structure which starts the suspicious person determination part 8 using CPU4. In this case, it is necessary to always supply power to the CPU 4.

  In the above description, the intrusion of a person is detected using the infrared sensor 7. However, the present invention is not limited to the infrared sensor 7, and a simple mechanical switch is applied as long as it can detect the intrusion of a person. Any thing such as an object or a weight sensor may be used.

  In the above description, the digital video signal is divided into luminance images of 16 × 12 dots. However, the luminance image is not limited to 16 × 12 dots, but any luminance image such as 16 × 16 dots or 256 × 256 dots. You may divide into. In addition, the process is not limited to the division into luminance images, and any process may be used as long as the operation can be changed from the video signal. Further, this process may be performed in the entire region of the image captured from the camera, or may be performed in a partial region of the image (for example, in the vicinity of the door in FIG. 1). Alternatively, the area where this processing is performed may be set by the user.

  Further, in the above description, the change in operation is obtained by comparing the difference of the luminance image per unit time before and after the notification timing, but any process that can obtain the change in operation may be used. The luminance images may be compared as they are, or a comparison in consideration of a history of a series of operations may be performed using a motion vector.

  In the above description, the difference of the luminance image data per unit time is stored in the memory built in the CPU, but may be stored in other storage means such as a memory outside the CPU.

  In the above description, the compressed video signal data generated by the compressor 9 is temporarily stored in the SDRAM 10. However, the present invention is not limited to the SDRAM 10, and any other memory can be used as long as it can temporarily store data. Or a partial area of the storage medium may be used for this temporary storage.

  In the above description, the video is stored from the time when the person invades and the suspicious person determination unit 8 is activated. However, the present invention is not limited to this, and the video may be stored from the time when the person is determined to be a suspicious person. Good.

  In the above description, the digital video signal is compressed and recorded on the storage medium. However, if the data amount of the digital video signal is small or the storage medium has a large capacity, the digital video signal is not compressed and stored on the storage medium. It may be recorded. Alternatively, the recording may be performed not only on the storage medium but also on any device-fixed medium such as a built-in memory or hard disk, or any easily replaceable medium such as a flash card.

  In the above description, a notification signal composed of a call voice such as “Who is?” Is output. However, the notification signal is not limited to a call voice, and any notification signal may be output. For example, a monitor or the like that displays characters or symbols, a buzzer, an electric light, or the like may be used as long as a person is detected.

  Further, in the above description, when the person is determined to be a suspicious person, the video signal compressed data generated by the compressor 9 is recorded on the storage medium. However, the present invention is not limited to this. Then, it may be transmitted to a predetermined PC, portable terminal or the like. This makes it possible to monitor a home or the like even in a remote place.

  In the above description, after recording the video signal compressed data on the storage medium in step S7, the process proceeds to step S8, and the suspicious person determination unit 8 is shifted to the standby state. However, after step S7, the process proceeds to step S8. You may return to step S1 instead of proceeding to.

<Embodiment 2>
In the suspicious person determination device 100 according to Embodiment 1, the suspicious person is determined by using the change in the video signal before and after the notification timing. However, a change in the temperature signal may be used in addition to the change in the video signal.

  Hereinafter, the suspicious person determination device 200 according to Embodiment 2 of the present invention will be described with reference to FIGS. FIG. 6 is a block diagram illustrating a configuration of the suspicious person determination device 200. FIG. 7 shows a temperature image of an image (similar to FIG. 2) input to the suspicious person determination device 200. FIG. 8 shows a temperature change image which is a difference between the temperature images of FIG.

  First, the operation of the suspicious person determination device 200 will be described. In FIG. 6, the infrared sensor 7 and the system control unit 13 are always supplied with power by a sub power supply unit (not shown). For example, when a person crosses the infrared sensor 7 installed in front of the house entrance, a signal that the person has entered is input to the system control unit 13. Thus, the system control unit 13 controls the main power supply unit 15 to start power supply, thereby starting up the entire suspicious person determination device 200 including the suspicious person determination unit (suspicious person determination unit) 20.

  Next, for example, a video signal from a camera (not shown) installed so as to be able to capture an image of a visitor standing in front of the entrance door of the home is input from the video input terminal 5. The input video signal is converted from an analog signal to a digital signal by the video AD converter 1. The converted digital video signal is transmitted to the video switcher 2 controlled by the control signal 6 and the compressor 9 connected to the video AD converter 1 via the changeover switch 25.

  The changeover switch 25 performs an operation of transmitting both the video signal from the video system AD converter 1 and a temperature signal from a temperature system AD converter 22 described later to the compressor 9 by switching at high speed. Do.

  The digital video signal transmitted to the compressor 9 is compressed to generate compressed video signal data. This video signal compressed data is stored in the SDRAM 10 having a predetermined storage capacity under the control of the CPU 4. That is, in the SDRAM 10, when the amount of stored data is likely to exceed the storage capacity, the oldest data is erased in order.

  As for the digital video signal transmitted to the video system switcher 2, a luminance image and a luminance change image are generated and incorporated in the CPU 4 as described with reference to FIGS. 2 to 4 in the first embodiment. Stored in memory. Although detailed description of the generation of the luminance image and the luminance change image is omitted here, the point that the video system switcher 2 and the memory 3 are connected via the changeover switch 26 is different from the first embodiment. The changeover switch 26 performs an operation of transmitting both a luminance image from the video system switcher 2 and a temperature image from a temperature system switcher 24 described later to the memory 3 by switching at high speed.

  Further, as shown in FIG. 6, a temperature signal from a thermography (temperature sensor) (not shown) installed so as to measure the temperature around the entrance door of the home is input from the temperature sensor input terminal 21. The input temperature signal is converted from an analog signal to a digital signal by the temperature AD converter 22. The converted digital temperature signal is transmitted to the temperature system switcher 24 controlled by the control signal 23 and the compressor 9 connected to the temperature system AD converter 22 via the changeover switch 25. The control signal 23 is for performing the following temperature division operation.

  The digital temperature signal transmitted to the compressor 9 is compressed to generate temperature signal compressed data. The temperature signal compressed data is stored in the SDRAM 10 having a predetermined storage capacity under the control of the CPU 4. That is, in the SDRAM 10, when the amount of stored data is likely to exceed the storage capacity, the oldest data is erased in order.

  The digital temperature signal transmitted to the temperature system switcher 24 is divided into, for example, a 16 × 12 dot temperature image as shown in FIG. This temperature image is temporarily stored in the memory 3 as data for each dot. The CPU 4 reads the data stored in the memory 3 for each dot. At this time, the CPU 4 stores the difference per unit time of the temperature image data as a temperature change image in a memory (not shown) built therein.

  7 (a) to (c), the body temperature of a person who performs the operations shown in FIGS. 2 (a) to (c) is measured by thermography, and the (temperature) signal of the measurement result is used as a temperature system. A temperature image when divided into dots by the switcher 24 is shown. Further, as shown in FIGS. 8A to 8C, the CPU 4 calculates a difference per unit time of the temperature images shown in FIGS. 7A to 7C, that is, a temperature change image. Store in the built-in memory.

  Next, when a predetermined period has elapsed since the activation of the above-described suspicious person determination unit 20, the system control unit 13 controls the audio output unit 14, so that, for example, “who is?” A notification signal consisting of a calling voice is output.

  The CPU 4 compares brightness change images stored in its own memory before and after the notification timing in order to obtain a change in the movement of the person at the notification timing.

  As a result of the comparison, if the luminance change image has changed more than a predetermined threshold value set in advance, the CPU 4 determines that the detected person is a person having a characteristic that the motion is changed by notification, that is, a suspicious person. It is determined that it is a person.

  Further, the CPU 4 compares temperature change images stored in its own memory before and after the notification timing in order to obtain a change in the body temperature of the person at the notification timing.

  As a result of the comparison, when the temperature change image has changed more than a predetermined threshold value set in advance, the CPU 4 detects that the detected person is upset by the notification, that is, a person having a characteristic that the body temperature changes, that is, a suspicious person. It is determined that it is a person. In this comparison, for example, the determination can be performed by using a temperature change rate composed of the number of dots of the temperature change image. FIG. 8D shows a temperature change image of a person whose movement does not change after notification but whose body temperature changes.

  That is, the suspicious person determination device 200 according to the present embodiment determines a suspicious person using changes in both operation and body temperature. Therefore, even when the change in the action of the suspicious person is small, the suspicious person can be determined more accurately.

  As a result of the comparison, when the temperature change image changes smaller than a predetermined threshold value set in advance, the CPU 4 determines that the visitor is a general visitor.

  As a result of the comparison, when it is determined that the person is a suspicious person, the CPU 4 stores the video signal compressed data and the temperature signal compressed data stored in the SDRAM 10 via the driver circuit 11 in a storage medium (shown in the figure). Do not record). In the SDRAM 10, the input video signal compressed data and temperature signal compressed data are stored from the time when a person enters and the suspicious person determination unit 20 is activated. Therefore, the video and temperature from the time when the suspicious person enters and the suspicious person determination device 20 is activated can be recorded on the storage medium. In addition, by storing only necessary data on the storage medium after temporarily storing it in the SDRAM 10, the storage medium can be used efficiently.

  Recording on the storage medium is performed in a predetermined period set in advance. After this period has elapsed, the system control unit 13 controls the main power supply unit 15 to stop the power supply of the suspicious person determination unit 20. Thereby, the suspicious person determination apparatus 200 again shifts to the mode in which the intrusion of the person is detected by the infrared sensor 7.

  If it is determined as a general visitor as a result of the comparison, the system control unit 13 controls the main power supply unit 15 to supply power to the suspicious person determination unit 20 after a predetermined period has elapsed. Stop. Thereby, the suspicious person determination apparatus 200 again shifts to the mode in which the intrusion of the person is detected by the infrared sensor 7.

  Thus, in the suspicious person determination device and the suspicious person determination method according to the present embodiment, a change in body temperature is used in addition to the change in operation in the first embodiment. Therefore, in addition to the effect of the first embodiment, there is an effect that the suspicious person can be more accurately determined even when the change in the movement of the person is small. In addition, since the temperature around the entrance door of the home can be measured, for example, it is possible to detect an increase in temperature due to fire or arson.

  In the above description, the digital video signal is divided into 16 × 12 dot temperature images, but not limited to 16 × 12 dots, any temperature image such as 16 × 16 dots or 256 × 256 dots may be used. You may divide into. Further, the process is not limited to the division into temperature images, and any process may be used as long as the process can obtain a change in body temperature from the temperature signal. Further, this process may be performed in the entire region of the image captured from the camera, or may be performed in a partial region of the image (for example, in the vicinity of the door in FIG. 1). Alternatively, the area for performing this process may be settable by the user.

  Further, in the above description, the change in body temperature is obtained by comparing the difference of the temperature image per unit time before and after the notification timing, but it may be any process that can obtain the change in body temperature, for example, You may compare a temperature image as it is.

  In the above description, the difference of the temperature image data per unit time is stored in the memory built in the CPU, but may be stored in other storage means such as a memory outside the CPU.

  In the above description, the temperature signal compressed data generated by the compressor 9 is temporarily stored in the SDRAM 10. However, the present invention is not limited to the SDRAM 10, and any other storage is possible as long as it can temporarily store data. Or a partial area of the storage medium may be used for this temporary storage.

  In the above description, the digital temperature signal is compressed and recorded on the storage medium. However, when the data amount of the digital video signal is small or the capacity of the storage medium is large, the digital temperature signal is not compressed. It may be recorded. Alternatively, the recording may be performed not only on the storage medium, but also on any device-fixed medium such as a built-in memory or hard disk, or any medium that can be exchanged for preparation such as a flash card.

<Embodiment 3>
In the suspicious person determination device 100 according to Embodiment 1, the suspicious person is determined by using the change in the video signal before and after the notification timing. However, an audio signal may be used instead of the change in the video signal.

  Hereinafter, a suspicious person determination device 300 according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 9 is a block diagram illustrating a configuration of the suspicious person determination device 300.

  First, the operation of the suspicious person determination device 300 will be described. In FIG. 9, the infrared sensor 7 and the system control unit 13 are always supplied with power by a sub power supply unit (not shown). For example, when a person crosses the infrared sensor 7 installed in front of the house entrance, a signal that the person has entered is input to the system control unit 13. As a result, the system control unit 13 controls the main power supply unit 15 to start power supply, thereby starting up the entire suspicious person determination device 300 including the suspicious person determination unit (suspicious person determination unit) 50.

  Next, for example, a video signal from a camera (not shown) installed so as to be able to capture an image of a visitor standing in front of the entrance door of the home is input from the video input terminal 5. The input video signal is converted from an analog signal to a digital signal by the video AD converter 1. The converted digital video signal is transmitted to the compressor 9.

  The digital video signal transmitted to the compressor 9 is compressed to generate compressed video signal data. This video signal compressed data is stored in the SDRAM 10 having a predetermined storage capacity under the control of the CPU 4. That is, in the SDRAM 10, when the amount of stored data is likely to exceed the storage capacity, the oldest data is erased in order.

  Also, as shown in FIG. 9, an audio signal from a microphone 52 installed so that audio around the entrance door at home can be input is input from the audio input unit 51.

  Next, when a predetermined period has elapsed since the activation of the above-described suspicious person determination unit 50, the system control unit 13 controls the audio output unit 14 to, for example, “who is?” From the speaker 16. A notification signal consisting of a calling voice is output.

  Then, the CPU 4 inputs the voice uttered by the person from the microphone 52 until the predetermined period elapses from the timing of the notification, and converts it into a digital signal by the voice input unit 51. The converted digital audio signal is sent to the CPU 4. This CPU 4 uses an information pattern including the level, frequency, length, intonation, etc. for an audio pattern (for example, a normal response such as “courier service”) issued by a general visitor who is not a suspicious person. Pre-stored. The CPU 4 compares the input digital audio signal with a previously stored information pattern.

  If the detected person is a suspicious person, it will be upset by the notice, and it will be characteristic about voice information (voice signal), such as leaving silently or being surprised and escaping with a strange sound or strange sound. It is thought that action is taken.

  Therefore, as a result of the comparison, if the digital audio signal is a special audio pattern that is not stored in advance, or if no audio is input, the CPU 4 determines that the detected person is a suspicious person. To do.

  As a result of the comparison, if the digital audio signal is similar or similar to the previously stored audio pattern, the CPU 4 determines that the visitor is a general visitor.

  If it is determined as a suspicious person as a result of the comparison, the CPU 4 records the compressed video signal data stored in the SDRAM 10 on a storage medium (not shown) built in the storage device 12 via the driver circuit 11. . In the SDRAM 10, the input compressed video signal data is stored from the time when a person enters and the suspicious person determination unit 50 is activated. Therefore, it is possible to record the video from the time when the suspicious person enters and the suspicious person determination device 50 is activated on the storage medium. In addition, by storing only necessary data on the storage medium after temporarily storing it in the SDRAM 10, the storage medium can be used efficiently.

  Recording on the storage medium is performed in a predetermined period set in advance. After this period has elapsed, the system control unit 13 controls the main power supply unit 15 to stop the power supply of the suspicious person determination unit 50. Thereby, the suspicious person determination apparatus 300 again shifts to a mode in which the infrared sensor 7 detects the intrusion of a person.

  As a result of the comparison, when it is determined that the visitor is a general visitor, the system control unit 13 controls the main power supply unit 15 to supply power to the suspicious person determination unit 50 after a predetermined period has elapsed. Stop. Thereby, the suspicious person determination apparatus 300 again shifts to a mode in which the infrared sensor 7 detects the intrusion of a person.

  If it is determined that the visitor is a general visitor, the sound input from the microphone 52 may be stored in a storage medium, a memory, or the like. This makes it possible to confirm later who the visitor was.

  As described above, in the suspicious person determination device and the suspicious person determination method according to the present embodiment, audio information is used instead of the change of the video signal in the first embodiment. Therefore, in addition to the effect of the first embodiment, it is possible to confirm later who the visitor was.

  In the above description, the audio patterns are compared using information patterns including level, frequency, length, intonation, etc., but not limited to this, any audio pattern can be specified. Such an information pattern may be used.

It is a block diagram which shows the structure of the suspicious person determination apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the image | video input into the suspicious person determination apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the brightness | luminance image in the suspicious person determination apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the brightness | luminance difference image in the suspicious person determination apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the suspicious person determination method which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the suspicious person determination apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the temperature image in the suspicious person determination apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the temperature difference image in the suspicious person determination apparatus which concerns on Embodiment 2 of this invention. It is a block diagram which shows the structure of the suspicious person determination apparatus which concerns on Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image system AD converter, 2 Image system switcher, 3 Memory, 4 CPU, 5 Image input terminal, 6,23 Control signal, 7 Infrared sensor, 8, 20, 50 Suspicious person determination part, 9 Compressor, 10 SDRAM, DESCRIPTION OF SYMBOLS 11 Driver circuit, 12 Storage device, 13 System control part, 14 Sound output part, 15 Main power supply part, 16 Speaker, 21 Temperature sensor input terminal, 22 Temperature system AD converter, 24 Temperature system switcher, 25, 26 Changeover switch 51 Voice input part 52 Microphone 100-300 Suspicious person determination apparatus.

Claims (8)

Detection means for detecting a person to be determined;
Notification means for notifying the person that the detection has been performed;
Suspicious person judgment means for judging whether or not the person is a suspicious person based on a change in a signal based on the reaction of the person accompanying the notification;
A suspicious person determination device comprising: The suspicious person determination device according to claim 1,
The suspicious person determination device, wherein the signal is a video signal. The suspicious person determination device according to claim 1,
The suspicious person determination device, wherein the signal is a temperature signal. The suspicious person determination device according to claim 1,
The suspicious person determination device, wherein the signal is an audio signal. A suspicious person determination device according to any one of claims 1 to 4,
The suspicious person judging device is characterized in that power is not supplied from the main power supply means before the detection is performed. A suspicious person determination device according to any one of claims 1 to 5,
A suspicious person judging device, further comprising recording means for recording a video of the person on a recording medium when the person is judged to be a suspicious person. The suspicious person determination device according to any one of claims 1 to 6,
The suspicious person determination device according to claim 1, wherein when the person is determined to be a suspicious person, the video of the person is transmitted to a transmission path. Detecting a person to be determined; and
Notifying the person that the detection has been performed;
Determining whether the person is a suspicious person based on a change in a signal based on the reaction of the person accompanying the notification;
A suspicious person determination method comprising:

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